(* Copyright (C) 2005, 2006 Free Software Foundation, Inc. *)
(* This file is part of GNU Modula-2.

GNU Modula-2 is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

GNU Modula-2 is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with gm2; see the file COPYING.  If not, write to the Free Software
Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *)
MODULE Countdown;
(*
 * FOR loop marches down to the bottom of the earth.
 *
 * WARNING: CODE CARRIES NO WARRATY! USE AT OWN RISK!
 *)
IMPORT StrIO, NumberIO, libc ;

VAR
   x, n :CARDINAL;
BEGIN
   x := 0 ;
   FOR n := 10 TO 0 BY -1 DO
      NumberIO.WriteCard(n, 4); StrIO.WriteLn ;
      INC(x) ;
      IF x>20
      THEN
         StrIO.WriteString('FOR BY -1 test failed') ;
         StrIO.WriteLn ;
         libc.exit(1)
      END
   END (*FOR*)
END Countdown.